Left Hand Cobalt Fractional Drill Bit 1/4In - Hanson

The Hanson 30516 1/4" Left Hand Cobalt Fractional Drill Bit is engineered for professional technicians and mechanics tackling demanding applications. This mechanics-length drill bit features a left-hand spiral, making it an essential tool for removing broken fasteners when used in conjunction with screw extractors. Its robust construction is designed to penetrate tough and abrasive materials with efficiency and precision.

Key Features

• M-42 8% Cobalt High-Speed Steel: Constructed from premium M-42 8% cobalt high-speed steel, offering superior abrasive resistance and extended tool life when drilling into hardened or tough metals.
• Heavy-Duty Spiral Flute: Designed with a heavy-duty spiral flute for efficient and faster chip ejection, preventing material buildup and maintaining cutting performance.
• Shorter Cutting Lips: Features shorter cutting lips that effectively reduce torque requirements, facilitating smoother drilling in high tensile strength materials.
• 135-Degree Split Point: The 135-degree split point allows for quick and accurate self-centering, reducing the need for pilot drilling and minimizing feed pressure for easier penetration without work hardening.
• Left Hand Rotation: Specifically designed for left-hand rotation, making it ideal for freeing broken bolts, studs, or screws as it can help loosen the fastener while drilling.

Applications

This Hanson 30516 drill bit is invaluable for automotive, industrial, and maintenance professionals. Its left-hand design is particularly effective when used with screw extractors for removing seized or broken fasteners without further tightening them. It excels in drilling through challenging materials such as stainless steel, cast iron, and other high tensile strength alloys commonly found in engine blocks, chassis components, and industrial machinery.

Specifications

• Drill Bit Size: 1/4 inch
• Overall Length: 2.5 inches
• Material: M-42 8% Cobalt High-Speed Steel